title: The effects of law enforcement activity on a population of opiate abusers.
mesh_terms: D000328:Adult; D000428:Alcohol Drinking; D004335:Drug and Narcotic Control; D006801:Humans; D007880:Legislation, Drug; D008691:Methadone / Q000627:therapeutic use; D008875:Middle Aged; D009892:Opium / Q000652:urine; D011153:Population; D019966:Substance-Related Disorders / Q000628:therapy*
chemical_list: D009892:Opium; D008691:Methadone